121121012221102 has 4 divisors (see below), whose sum is σ = 181681518331656. Its totient is φ = 60560506110550.

The previous prime is 121121012221093. The next prime is 121121012221133. The reversal of 121121012221102 is 201122210121121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 121121012221102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30280253055274 + ... + 30280253055277.

It is an arithmetic number, because the mean of its divisors is an integer number (45420379582914).

Almost surely, 2^{121121012221102} is an apocalyptic number.

121121012221102 is a deficient number, since it is larger than the sum of its proper divisors (60560506110554).

121121012221102 is an equidigital number, since it uses as much as digits as its factorization.

121121012221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60560506110553.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 121121012221102 its reverse (201122210121121), we get a palindrome (322243222342223).

The spelling of 121121012221102 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, twelve million, two hundred twenty-one thousand, one hundred two".